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综述了单光纤成像技术的研究现状和动态。单光纤成像技术采用单根多模光纤进行成像,光纤既是成像器件又是传像器件,无需增加扫描器件和成像透镜便可将光纤一端视场范围内的场景一次性传输到另一端,因此又称为宽场光纤成像技术。该技术可减小成像光纤探头的直径,实现超细内窥成像。单光纤成像技术是一种计算成像方法,是在全息光学和傅里叶光学的基础上发展起来的,包括传输矩阵法和相位补偿法两种成像方法。对于多模光纤,如果可以预先得到频域(或空间域)的传输矩阵,则可以从光纤输出端光场中恢复目标图像,也可以预先测量光束通过光纤后的波前畸变。在成像系统中增加该波前畸变的共轭相位场,可以消除相应的波前畸变,从而在输出端获得不失真的目标图像。
The research status and dynamics of single fiber imaging are reviewed. Single-fiber imaging uses a single multimode fiber for imaging. An optical fiber is both an imaging device and an imaging device. One end of the field of view of an optical fiber can be transmitted to the other end without adding scanning devices and imaging lenses. Therefore, Wide-field fiber imaging technology. The technology reduces the diameter of the imaging fiber optic probe for ultra-thin endoscopic imaging. Single-fiber imaging is a computational imaging method developed on the basis of holographic optics and Fourier optics, including two imaging methods: transmission matrix method and phase compensation. For a multimode optical fiber, if the transmission matrix in the frequency domain (or the spatial domain) can be obtained in advance, the target image can be recovered from the optical field at the output end of the optical fiber, or the wavefront distortion after passing the optical fiber can be measured in advance. Adding the conjugate phase field of this wavefront distortion to the imaging system can eliminate the corresponding wavefront distortion and obtain an undistorted target image at the output.